A patient with chronic myeloid leukemia and situs inversus totalis: A case report

  • Authors:
    • Yunxia Sun
    • Xiaoli Li
    • Lijun Li
    • Huan Liu
    • Qian Xu
    • Bei Liu
  • View Affiliations

  • Published online on: October 10, 2017     https://doi.org/10.3892/ol.2017.7166
  • Pages: 7425-7430
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Abstract

In the present study, a case of chronic myeloid leukemia (CML) with complete situs inversus in a 68‑year‑old female patient was reported. The patient presented with general weakness, abdominal distension and tenderness in the right hypochondrium. A chest X‑ray revealed a right‑sided heart. Ultrasonography revealed situs inversus totalis. A bone marrow smear demonstrated CML in the accelerated phase. Imatinib mesylate was subsequently administered; the patient stopped taking imatinib mesylate following discharge from the hospital. The patient presented with dizziness, fatigue, and abdominal distention and pain 1 year subsequently. A bone marrow smear demonstrated CML in the blast crisis phase; CML had progressed to acute myeloid leukemia (AML) M2a. The patient was treated with imatinib mesylate and cytarabine. After 5 days, the white blood cell count had decreased compared with that measured at the time of admission, and the previous relevant symptoms had disappeared. The patient succumbed to AML 3 months after discharge from the hospital. Situs inversus totalis is an uncommon congenital anomaly that often occurs concomitantly with other disorders. The present study documented, to the best of our knowledge, the second recorded case of CML in a patient with situs inversus totalis. Previous studies on the pathogenesis of situs inversus have suggested it is caused by embryonic cells failing to rotate normally during early embryonic development. Although there are case reports of situs inversus totalis in patients with cancer, there are few reports on the association between situs inversus totalis and cancer. The present study examined a case of CML with situs inversus totalis and assessed whether the latter may be associated with cancer.

Introduction

Situs inversus is a rare congenital anomaly that occurred in 1/8,000-1/25,000 people globally in 2001 (1). Situs inversus totalis (SIT) is an uncommon congenital anomaly that often occurs concomitantly with other disorders (1,2), including congenital heart disease, ciliary dyskinesia, Kartagener's syndrome and polysplenia (35). Chronic myeloid leukemia (CML) is a malignant clonal disorder of pluripotent hematopoietic stem cells and accounts for 15% of all adult leukemia cases in the United States in 2007 (6). The diagnosis of CML is performed on the basis of detecting the breakpoint cluster region protein (BCR)-Abelson murine leukemia viral oncogene homolog 1 (ABL) gene or Philadelphia chromosome [t(9; 22)(q34; q11.2)] (7). The translocation is detected using routine cytogenetics, fluorescence in situ hybridization (FISH) and molecular reverse-transcription polymerase chain reaction tests (7). The global CML annual incidence rate was 1.6–2.0/100,000 people per year (8). The CML annual incidence rate in China was 0.36/10 million people in 1992, which was decreased compared with that in Western countries (9). The first generation of tyrosine inhibitor imatinib as a first-line treatment of patients with CML is associated with a 10-year survival rate of 85–90% (10). To the best of our knowledge, the literature reports only 1 case of CML in a patient exhibiting SIT; the patient was a 69-year-old male exhibiting chronic granulocytic leukemia and SIT, which had induced a right-sided splenomegaly that was originally diagnosed as a hepatomegaly (11). The present study reported a case of CML with complete situs inversus in a 68-year-old female patient. A series of imaging studies revealed total mirror reversal of the thoracic and abdominal organs. A bone marrow smear supported the diagnosis of CML in the accelerated phase. The co-occurrence of CML and SIT prompted the present study to evaluate whether these conditions may be associated.

Case report

A 68-year-old female patient was admitted to the Department of Hematology at The First Affiliated Hospital of Lanzhou University (Lanzhou, China) on September 3, 2012. The patient reported a 2-month history of general weakness and night sweats and a 1-month history of experiencing abdominal distension and tenderness in the right hypochondrium. A chest X-ray and conventional electrocardiogram revealed a right-sided heart. Abdominal ultrasound revealed SIT, a condition characterized by total mirrored reversal of the thoracic and abdominal organs.

A conventional electrocardiogram revealed dextrocardia (Fig. 1). A chest X-ray revealed heart and stomach gas on the right side (Fig. 2). An abdominal ultrasound examination indicated SIT and spleen enlargement. A complete blood count test obtained the following results: 12% original and naive cells (normal range, 0%); hemoglobin, 109 g/l (normal range, 110–150 g/l); 1.897×1010 leukocytes/l (normal range, 0.400–1.000×1010 leukocytes/l); 1.176×1010 neutrophils/l (normal range, 0.200–0.700×1010 neutrophils/l); 2.85×109 lymphocytes/l (normal range, 1.50–4.00×109 lymphocytes/l); 1.52×109 monocytes/l (normal range, 0.00–0.45×109 monocytes/l); 3.8×108 eosinophils/l (normal range, 0.5–3.0×108 eosinophils/l); 2.47×109 basophils/l (normal range, 0.00–0.20×109 basophils/l) and 3.86×1011 platelets/l (normal range, 1.00–3.00×1011 platelets/l). A bone marrow smear demonstrated a myeloid:erythroid ratio of 3.68:1 (normal range, 2.00–4.00:1), with original granular cells accounting for 18.0% of the total cells (normal range, 0.5–2.0%), and supported the diagnosis of CML in the accelerated phase. Karyotype analysis demonstrated 46, XX, t (9;22; q34;q11.2) in the 20 assessed cells and was the sole abnormality observed. FISH was performed using the gene locus-specific probe (GLP) BCR/GLP ABL1 to identify the BCR-ABL1 fusion gene. The rate of BCR-ABL1 fusion was 84%, as determined using FISH (Fig. 3). The present study extracted the bone marrow samples from the patients and sent the BCR-ABL1 fusion gene to undergo a quantitative polymerase chain reaction. The method was determined using fluorescence quantitative polymerase chain reaction. This method is from the bone marrow mononuclear cells in the separation and purification of RNA, TRIzol (TransStart Inc., Beijing, China) reagent was used to extract total RNA. Subsequently, reverse transcription of cDNA was performed using the reverse transcription kit (Takara Bio Inc., Otsu, Japan), using RNA as a template. The temperature protocol were as follows: 37°C for 15 min, 85°C for 5 sec and kept at 4°C until use. The fluorophore used for the polymerase chain reaction was Dalian's Tap enzyme (Takara Bio Inc.). The target gene primers were as follows: BCR-ABL, bcr: 5′-AGGGTGCACAGCCGCAACGGC-3′ and abl, 5′-GGCTTCACTCAGACCCTGAGG-3. The reference gene was β-actin. The reference gene primers were as follows: β-actin, forward: 5′-GGAGATTACTGCCCTGGCTCCTA-3′ and reverse: 5′-GACTCATCGTACTCCTGCTTGCTG-3′. The thermocycling conditions were as follows: 95°C for 30 sec for 1 cycle, 95°C for 5 sec and 60°C for 20 sec for 40 cycles. The results were expressed as 2−ΔΔCq (12). The quantity of BCR-ABL transcript was normalized to the ABL expression level. The copy number of BCR-ABL fusion gene and the copy number of ABL were calculated, and the result was expressed as the ratio of BCR-ABL copy number to ABL copy number. The present patient's BCR-ABL1 fusion gene quantitative detection revealed a BCR-ABL1 fusion gene-positive, a BCR-ABL1 copy number of 4.96×104, and a BCR-ABL1/ABL1 ratio of 5:18. Imatinib mesylate (600 mg/day) was subsequently administered from September 12, 2012 until the patient ceased taking imatinib mesylate following discharge from the hospital on September 16, 2012.

The patient last presented on November 20, 2013 with dizziness, fatigue, and abdominal distention and pain. A bone marrow smear demonstrated a myeloid:erythroid ratio of 57.33:1.00, with original granular cells accounting for 21% of the total cells, and supported the diagnosis of CML in the blast crisis phase; CML had progressed to acute myeloid leukemia (AML) M2a. Karyotype analysis also revealed 46, XX, t(9;22;q34;q11.2) in the 20 assessed cells. The positive rate of BCR-ABL1 fusion was 90%, as determined by FISH (Fig. 4).

The initial white blood cell (WBC) count was 2.495×1010/l (normal range, 4–10×1010/l). After 3 days of treatment with imatinib mesylate (600 mg/day) the WBC count of the patient had increased to 5.083×1010/l, at which point the imatinib mesylate treatment was replaced by the continuous intravenous infusion of cytarabine (200 mg/m2 day). After 2 days of cytarabine treatment, the WBC count had decreased to 1.7×1010/l and the previous relevant symptoms were no longer present. The patient was discharged from the hospital on November 28, 2013 and succumbed to AML 3 months subsequently. The patient's family provided written informed consent for the present study to be published.

Discussion

The anatomical arrangement of human organs may be described using the following categories: Situs solitus; situs inversus; and situs ambiguous. The normal position of the thoracic and abdominal viscera is referred to as situs solitus. Situs inversus is a rare congenital anomaly and is classified as either SIT or partial situs inversus (13). SIT is associated with an exchange in the position of the thoracic and abdominal viscera between the left and right sides, resulting in a mirror reversal of the thoracic and abdominal organs (14). Situs ambiguous is an uncommon condition in which the cardiac and visceral organs are abnormally distributed without mirror imaging from conventional anatomy (15).

Situs inversus is not a premalignant condition. However, rare synchronous and primary malignancies have been reported in the literature; the PubMed database includes 89 case reports of patients with cancer exhibiting situs inversus or situs ambiguous between 1952 and 2015 (Fig. 5). Among these were 78 and 11 cases of cancer in patients exhibiting situs inversus and situs ambiguous, respectively, and only 1 case of CML in a patient exhibiting SIT (11). Among these 89 case reports in the Pubmed database, the four most common cancers reported in patients with situs inversus included gastric cancer, colorectal adenocarcinoma, lung cancer and renal cell carcinoma (Table I). Information on multiple primary malignancies in patients with situs inversus or situs ambiguous (Table II), and cases of lymphoma and chronic granulocytic leukemia with situs inversus or situs ambiguous was provided (Table III).

Table I.

Types of malignancy in patients with SI or SA.

Table I.

Types of malignancy in patients with SI or SA.

Type of cancerNo. of casesSI/SA
Gastric cancer1514/1
Colorectal adenocarcinoma1111/0
Lung cancer1010/0
Renal cell carcinoma96/3
Esophageal (squamous or adenocarcinoma)77/0
Bile duct cancer53/2
Lymphoma55/0
Hepatocellular carcinoma44/0
Pancreatic adenocarcinoma43/1
Endometrial cancer22/0
Chronic granulocytic leukemia2a2/0
Periampullary carcinoma21/1
Appendiceal mucinous adenocarcinoma11/0
Adrenal tumor11/0
Bladder cancer11/0

a Includes the case reported in the present study. SI, situs inversus; SA, situs ambiguous.

Table II.

Patients with multiple types of primary malignancy and SI or SA.

Table II.

Patients with multiple types of primary malignancy and SI or SA.

Type of cancerSI/SA(Refs.)
Combined hepatocellular and cholangiocellular carcinoma1/0(24)
Synchronous colonic tumors on the proximal transverse and sigmoid colon1/0(25)
Metachronous rectosigmoid colon and gastric cancer1/0(25)
Lung cancer and mediastinal tumor1/0(26)
Synchronous double cancer originating from the stomach and rectum1/0(27)
Synchronous early cancer of the esophagus and larynx1/0(28)
Laryngeal neoplasms1/0(29)
Hepatocellular and early signet ring cell gastric carcinoma1/0(30)
Double cancer of the stomach and esophagus0/1(31)
Gastrointestinal neoplasms, bladder and mammary cancer, and basal cell carcinoma0/1(16)
Carcinoma of the right breast, bladder cancer, endometrial adenocarcinoma and non-Hodgkin lymphoma of the scalp0/1(32)

[i] SI, situs inversus; SA, situs ambiguous.

Table III.

Patients with lymphoma or leukemia and SI or SA.

Table III.

Patients with lymphoma or leukemia and SI or SA.

Type of cancerAgeSexSI/SA(Refs.)
Hairy cell leukemia73Male1/0(33)
Mantle cell lymphoma73Male1/0(34)
Malignant lymphoma of the stomach51Female1/0(2)
Splenic lymphomatous infiltration65Male1/0(35)
Ileocecal lymphoma4Male1/0(36)
Chronic granulocytic leukemia69Male1/0(11)
Chronic granulocytic leukemiaa68Female1/0

a Represents the case reported in the present study. SI, situs inversus; SA, situs ambiguous.

Although the occurrence of malignancy in patients with SIT may be coincidental, certain studies have suggested a possible association between malignancy and SIT (1618). Previous studies have proposed that unidentified genes affecting the left-right axis arrangement may be associated with cancer susceptibility (19,20). Although this may potentially explain the occurrence of cancer in the patient with SIT assessed in the present study, no genes have been conclusively identified as candidates for this dual role to the best of our knowledge (16). The pathogenetic mechanisms underlying SIT were elucidated by previous studies, and it was shown that kinesin (KIF)3, an intracellular motor protein, has an important role in establishing left-right asymmetry (17). Nodal flow is autonomously generated by the rotation of cilia tilted toward the posterior of the cells of the ventral node. KIF3 molecular motors assist in the development of these cilia but are dysfunctional in SIT (21,22). It has also been reported that the KIF3 complex is involved in neural (N)-cadherin transport to the cell surface. The cell adhesion molecules N-cadherin and β-catenin are not transported to the cell surface in patients with SIT due to the absence of function in the KIF3 complex (18). Consequently, the excess β-catenins in the cytoplasm enter the nucleus and activate genes associated with cell proliferation, thereby facilitating the development and progression of cancer in patients with SIT (17). Cell-cell adhesion assists in coordinating cellular organization and collective cell migration, and is critical for the directional looping of developing embryonic organs (23). A previous study assessed the influence of collective cell migration on the breaking of left-right symmetry, and established a 2D microscale system that may be useful for fetal drug screening to assist in identifying and potentially inhibiting birth defects associated with alterations in cell-cell adhesion (24).

Since the data in the literature indicated that the incidence of situs inversus with overall malignancy or leukemia is extremely low, the present study concluded that the occurrence of CML with SIT in the patient assessed in the present study may be by chance. However, the diagnosis of SIT may also be established by future, larger studies, which could provide a means of predicting the disease and methods to prevent its progression.

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Spandidos Publications style
Sun Y, Li X, Li L, Liu H, Xu Q and Liu B: A patient with chronic myeloid leukemia and situs inversus totalis: A case report. Oncol Lett 14: 7425-7430, 2017
APA
Sun, Y., Li, X., Li, L., Liu, H., Xu, Q., & Liu, B. (2017). A patient with chronic myeloid leukemia and situs inversus totalis: A case report. Oncology Letters, 14, 7425-7430. https://doi.org/10.3892/ol.2017.7166
MLA
Sun, Y., Li, X., Li, L., Liu, H., Xu, Q., Liu, B."A patient with chronic myeloid leukemia and situs inversus totalis: A case report". Oncology Letters 14.6 (2017): 7425-7430.
Chicago
Sun, Y., Li, X., Li, L., Liu, H., Xu, Q., Liu, B."A patient with chronic myeloid leukemia and situs inversus totalis: A case report". Oncology Letters 14, no. 6 (2017): 7425-7430. https://doi.org/10.3892/ol.2017.7166